  <div id="banners">
    <p id="banner-xhtml"><a href="https://validator.w3.org/check?uri=referer"
    class="external">XHTML 1.0</a></p>

    <p id="banner-css"><a href=
    "https://jigsaw.w3.org/css-validator/check/referer" class=
    "external">CSS</a></p>

    <p id="banner-osi"><a href=
    "https://opensource.org/docs/definition.php" class="external">OSI
    Certified</a></p>
  </div>
